给下面语句排序,衔接恰当的一项是()
①因为较弱的电磁辐射,也会对人的神经系统与心血管系统产生一定的干扰。 ②人的大脑和神经会产生微弱的电磁波,当周围电器发出比它强数百万倍的电磁波时,人的神经活动就会受到严重干扰。 ③即使在不太强的电磁波环境中工作和生活,人也会受到影响。 ④如果长时间出于这种强电磁波的环境中,人会出现头痛,注意力不集中、嗜睡等症状,强电磁辐射会使心血管疾病加重、神经系统功能失调。
May I use your computer?
________. I'm working on it.( )
Glad to hear that
It doesn't matter
That's all right
I'm sorry
Basketball________ in 1891. Then in 1936 in Berlin, it became an event at the Olympics.( )
plays
is played
was played
played
Amy has read many history books, so she learns history________ of all the subjects.( )
well
bad
best
worst
Look! The children ________.
How happy they are!( )
was dancing
danced
are dancing
dances
You seem tired. What's wrong?
I ________ to study for my English test last night.( )
picked up
woke up
cheered up
stayed up